ront of the computer should be "universal" word omitted). To 1971, the United States INTEL company in the world will be the first time the two most core computer components - computing and controller, a large-scale integrated circuit technology integration in a chip, called the microprocessor (MICROPROCESSOR) , also known as the central processing unit (CPU).
到1970年，通用小型计算机业已出现并成批生产。于是将它移植过来作为数控系统的核心部件，从此进入了计算机数控（CNC）阶段（把计算机前面应有的"通用"两个字省略了）。到1971年，美国INTEL公司在世界上第一次将计算机的两个最核心的部件--运算器和控制器，采用大规模集成电路技术集成在一块芯片上，称之为微处理器（MICROPROCESSOR），又可称为中央处理单元（简称CPU）。
1974 microprocessor to be used in CNC system. This is because the function of the computer is too small to control a machine tool capacity affluent (the time has been used to control more than one machine, called Group Control), as a reasonable economic use of the microprocessor. Minicomputer reliability and then not ideal. Early microprocessor speed and functionality while still not high enough, but can be adopted to solve the multi-processor architecture. As microprocessor core is a general computer components, it is still known as the CNC.
到1974年微处理器被应用于数控系统。这是因为小型计算机功能太强，控制一台机床能力有富裕（故当时曾用于控制多台机床，称之为群控），不如采用微处理器经济合理。而且当时的小型机可靠性也不理想。早期的微处理器速度和功能虽还不够高，但可以通过多处理器结构来解决。由于微处理器是通用计算机的核心部件，故仍称为计算机数控。
By 1990, PC machines (personal computers, domestic habits that computer) performance has been developed to a high stage, as a CNC system to meet the requirements of the core components. NC system based on PC has now entered the stage.
到了1990年，PC机（个人计算机，国内习惯称微机）的性能已发展到很高的阶段，可以满足作为数控系统核心部件的要求。数控系统从此进入了基于PC的阶段。
In short, CNC has also experienced a stage three generations. That is, in 1970's fourth generation - small computer; 1974 of the fifth generation - microprocessors and the sixth-generation 1990 - Based on the PC (called PC-BASED abroad).
总之，计算机数控阶段也经历了三代。即1970年的第四代--小型计算机；1974年的第五代--微处理器和1990年的第六代--基于PC（国外称为PC-BASED）。
Also pointed out that, although the foreign computer has been renamed NC (CNC), but China still customary said Numerical Control (NC). Therefore, we stress the
